Java Integer to Binary integerToBinString(final int aValue, final int aFieldWidth)

Description

converts an integer to a bin string with leading zeros

License

Open Source License

Parameter

Parameter	Description
aValue	integer value for conversion
aFieldWidth	number of charakters in field

Return

a nice string

Declaration

public static String integerToBinString(final int aValue, final int aFieldWidth) 

Method Source Code

//package com.java2s;
/*//from  w  w  w .  ja  v  a 2 s.co  m
 * OpenBench LogicSniffer / SUMP project 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 *
 * 
 * Copyright (C) 2010-2011 J.W. Janssen, www.lxtreme.nl
 */

public class Main {
    /**
     * converts an integer to a bin string with leading zeros
     * 
     * @param aValue
     *          integer value for conversion
     * @param aFieldWidth
     *          number of charakters in field
     * @return a nice string
     */
    public static String integerToBinString(final int aValue, final int aFieldWidth) {
        // first build a mask to cut off the signed extension
        final long mask = (long) (Math.pow(2.0, aFieldWidth) - 1L);

        StringBuilder sb = new StringBuilder(Long.toBinaryString(aValue & mask));

        int numberOfLeadingZeros = Math.max(0, aFieldWidth - sb.length());
        for (; numberOfLeadingZeros > 0; numberOfLeadingZeros--) {
            sb.insert(0, '0');
        }

        return sb.toString();
    }
}

Related

1. int2binString(int x)
2. integerToBin(int value)
3. integerToBinaryString(int value)
4. integerToBinaryString(int value, int numberOfBits)
5. intToBinary(int binary, int digits)
6. intToBinary(int i)
7. intToBinary(int i, int byteLength)
8. intToBinary(long value, int bits)